Floor register grille



FIG. 1 is a perspective view of the floor register grille;

FIG. 2 is a top plan view of the floor register grille, the bottom being a mirror image of that shown;

FIG. 3 is a side view of the floor register grille, the opposite side being a mirror image of that shown; and,

FIG. 4 is an end view of the floor register grille, the opposite end being a mirror image of that shown. 

The ornamental design for a floor register grille, as shown and described. 